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<head><meta charset="utf-8"><title>I-prioritize #78192 InstCombine introduces an incorrect use… · t-compiler/wg-prioritization/alerts · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/index.html">t-compiler/wg-prioritization/alerts</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html">I-prioritize #78192 InstCombine introduces an incorrect use…</a></h3>

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<a name="214069972"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214069972" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214069972">(Oct 21 2020 at 15:46)</a>:</h4>
<p><span class="user-group-mention" data-user-group-id="3111">@WG-prioritization/alerts</span> issue <a href="https://github.com/rust-lang/rust/issues/78192">#78192</a> has been requested for prioritization.</p>
<h1><a href="https://forge.rust-lang.org/compiler/prioritization/procedure.html#assign-priority-to-unprioritized-issues-with-i-prioritize-label">Procedure</a></h1>
<ul>
<li>Priority?</li>
<li>Regression?</li>
<li>Notify people/groups?</li>
<li>Needs <code>I-nominated</code>?</li>
</ul>



<a name="214072717"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214072717" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Hameer Abbasi <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214072717">(Oct 21 2020 at 16:03)</a>:</h4>
<p>Definitely <code>P-critical</code>.</p>



<a name="214072784"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214072784" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> apiraino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214072784">(Oct 21 2020 at 16:04)</a>:</h4>
<p>Is this a regression? I see in the linked PR <a href="https://github.com/rust-lang/rust/issues/76683">#76683</a> <span class="user-mention silent" data-user-id="124288">oli</span>  expressed some concerns</p>



<a name="214073245"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214073245" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> apiraino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214073245">(Oct 21 2020 at 16:06)</a>:</h4>
<p>right. I don't have a lot of context, but it smells bad. I'd like to understand which Rust release impacts (stable, beta or nightly ... or all of them)</p>



<a name="214074835"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214074835" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Stu <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214074835">(Oct 21 2020 at 16:16)</a>:</h4>
<p>I'm not 100 per cent sure, but I think its from stable-to-beta</p>



<a name="214074976"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214074976" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214074976">(Oct 21 2020 at 16:17)</a>:</h4>
<p>If it regressed in <a href="https://github.com/rust-lang/rust/issues/76683">#76683</a> which landed a month ago, it’s in beta</p>



<a name="214075056"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075056" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075056">(Oct 21 2020 at 16:17)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/pull/76683">https://github.com/rust-lang/rust/pull/76683</a> is only present on master</p>



<a name="214075152"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075152" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075152">(Oct 21 2020 at 16:18)</a>:</h4>
<p>You can tell by looking at the commit</p>



<a name="214075161"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075161" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075161">(Oct 21 2020 at 16:18)</a>:</h4>
<p>It will say the tags</p>



<a name="214075294"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075294" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075294">(Oct 21 2020 at 16:19)</a>:</h4>
<p>Oh hmm that doesn't match the milestone though</p>



<a name="214075304"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075304" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075304">(Oct 21 2020 at 16:19)</a>:</h4>
<p>Are you sure? It’s tagged with milestone 1.48.0</p>



<a name="214075305"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075305" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075305">(Oct 21 2020 at 16:19)</a>:</h4>
<p>Wonder what's up with that</p>



<a name="214075324"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075324" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075324">(Oct 21 2020 at 16:19)</a>:</h4>
<p><span aria-label="shrug" class="emoji emoji-1f937" role="img" title="shrug">:shrug:</span></p>



<a name="214075351"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075351" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075351">(Oct 21 2020 at 16:19)</a>:</h4>
<p>It was merged one month ago</p>



<a name="214075379"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075379" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075379">(Oct 21 2020 at 16:19)</a>:</h4>
<p>I think it’s most likely in beta</p>



<a name="214075400"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075400" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Stu <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075400">(Oct 21 2020 at 16:19)</a>:</h4>
<p>I tested in the playground and it seems like it is in beta</p>



<a name="214075422"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075422" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075422">(Oct 21 2020 at 16:19)</a>:</h4>
<p>When did beta last branch? Two weeks ago?</p>



<a name="214075566"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075566" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075566">(Oct 21 2020 at 16:20)</a>:</h4>
<p>Anyway I guess we should consider the worst case scenario, i.e. the bug is in beta and it is <em>coming for you</em></p>



<a name="214075756"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214075756" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214075756">(Oct 21 2020 at 16:21)</a>:</h4>
<p>Does everyone agree on <code>P-critical</code>?</p>



<a name="214076590"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214076590" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> apiraino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214076590">(Oct 21 2020 at 16:27)</a>:</h4>
<p>we now have the shiny new <code>regression-*</code> labels, we can also use them :-)</p>



<a name="214077423"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214077423" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oliver <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214077423">(Oct 21 2020 at 16:32)</a>:</h4>
<p>/me is relieved</p>



<a name="214080133"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214080133" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214080133">(Oct 21 2020 at 16:52)</a>:</h4>
<p><span class="user-mention" data-user-id="281739">@oliver</span> Were you worried?</p>



<a name="214080327"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214080327" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oliver <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214080327">(Oct 21 2020 at 16:53)</a>:</h4>
<p>wasn't everyone?</p>



<a name="214080494"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214080494" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214080494">(Oct 21 2020 at 16:54)</a>:</h4>
<p>Finding this bug in beta is still fine</p>



<a name="214080560"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214080560" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214080560">(Oct 21 2020 at 16:55)</a>:</h4>
<p>Finding it in stable would have been very worrying indeed</p>



<a name="214080721"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214080721" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214080721">(Oct 21 2020 at 16:56)</a>:</h4>
<p>But finding this in beta means we can disable the mir optimization, which is simple to backport</p>



<a name="214080936"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214080936" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oliver <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214080936">(Oct 21 2020 at 16:57)</a>:</h4>
<p>I was replying to the comment about adding a public <code>regressions-*</code> tag</p>



<a name="214086045"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214086045" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> DPC <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214086045">(Oct 21 2020 at 17:30)</a>:</h4>
<p><span class="user-mention" data-user-id="232545">@Joshua Nelson</span> milestones will be accurate since 1.48 onwards they are auto-added</p>



<a name="214097578"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214097578" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jonas Schievink  [he/him] <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214097578">(Oct 21 2020 at 18:55)</a>:</h4>
<p><span class="user-mention silent" data-user-id="232545">Joshua Nelson</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214075294">said</a>:</p>
<blockquote>
<p>Oh hmm that doesn't match the milestone though</p>
</blockquote>
<p>The beta channel has no git tags</p>



<a name="214109412"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214109412" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214109412">(Oct 21 2020 at 20:20)</a>:</h4>
<p>I guess we should process and tag this as <code>P-critical</code> and label it as a <code>regression-from-stable-to-beta</code>, right?</p>



<a name="214109458"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214109458" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214109458">(Oct 21 2020 at 20:21)</a>:</h4>
<p><span class="user-mention silent" data-user-id="250987">apiraino</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214076590">said</a>:</p>
<blockquote>
<p>we now have the shiny new <code>regression-*</code> labels, we can also use them :-)</p>
</blockquote>
<p>Were you referring to <code>regression-untriaged</code>?</p>



<a name="214109742"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214109742" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214109742">(Oct 21 2020 at 20:23)</a>:</h4>
<p>Issue <a href="https://github.com/rust-lang/rust/issues/78192">#78192</a>'s prioritization request has been removed.</p>



<a name="214111380"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214111380" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214111380">(Oct 21 2020 at 20:36)</a>:</h4>
<p>can somebody summarize this issue?</p>



<a name="214111406"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214111406" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214111406">(Oct 21 2020 at 20:37)</a>:</h4>
<p>I'm trying to go over pending issues</p>



<a name="214111410"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214111410" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> apiraino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214111410">(Oct 21 2020 at 20:37)</a>:</h4>
<p>Based on  <span class="user-mention silent" data-user-id="230287">Stu</span>'s  <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214075400">comment</a> I think that ...</p>
<p><span class="user-mention silent" data-user-id="116266">Santiago Pastorino</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214109412">said</a>:</p>
<blockquote>
<p>I guess we should process and tag this as <code>P-critical</code> and label it as a <code>regression-from-stable-to-beta</code>, right?</p>
</blockquote>
<p><span aria-label="point up" class="emoji emoji-1f446" role="img" title="point up">:point_up:</span> this</p>



<a name="214111455"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214111455" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> apiraino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214111455">(Oct 21 2020 at 20:37)</a>:</h4>
<p><span class="user-mention silent" data-user-id="116266">Santiago Pastorino</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214111380">said</a>:</p>
<blockquote>
<p>can somebody summarize this issue?</p>
</blockquote>
<p>I'll add a bit of detail</p>



<a name="214111466"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214111466" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214111466">(Oct 21 2020 at 20:37)</a>:</h4>
<p><span aria-label="+1" class="emoji emoji-1f44d" role="img" title="+1">:+1:</span></p>



<a name="214111484"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214111484" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214111484">(Oct 21 2020 at 20:37)</a>:</h4>
<p>it would be nice to explain what's wrong with doing what the optimization does in the summary</p>



<a name="214112124"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214112124" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> apiraino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214112124">(Oct 21 2020 at 20:42)</a>:</h4>
<p><span class="user-mention silent" data-user-id="116266">Santiago Pastorino</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214111484">said</a>:</p>
<blockquote>
<p>it would be nice to explain what's wrong with doing what the optimization does in the summary</p>
</blockquote>
<p>not sure I have enough context for that, but I'll try. You can always improve and fill in the blanks <span aria-label="thumbs up" class="emoji emoji-1f44d" role="img" title="thumbs up">:thumbs_up:</span></p>



<a name="214115597"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214115597" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> apiraino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214115597">(Oct 21 2020 at 21:12)</a>:</h4>
<p>So, there is a PR already merged <a href="https://github.com/rust-lang/rust/issues/78195">#78195</a> to fix this, not sure about the further work needed to adress this issue. Can anyone please add some context for this case? There are two linked  PR and an issue but I can't reorder their logic <span aria-label="thinking" class="emoji emoji-1f914" role="img" title="thinking">:thinking:</span></p>



<a name="214115679"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214115679" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214115679">(Oct 21 2020 at 21:13)</a>:</h4>
<p>We need to backport the PR</p>



<a name="214115758"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214115758" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214115758">(Oct 21 2020 at 21:14)</a>:</h4>
<p>I'm pretty sure we could just tag this as <code>P-medium</code> now</p>



<a name="214115768"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214115768" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214115768">(Oct 21 2020 at 21:14)</a>:</h4>
<p>The PR will get discussed in the meeting anyway</p>



<a name="214115810"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214115810" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214115810">(Oct 21 2020 at 21:14)</a>:</h4>
<p>The context should go there</p>



<a name="214116255"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116255" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116255">(Oct 21 2020 at 21:19)</a>:</h4>
<p>We also need a test I think</p>



<a name="214116295"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116295" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116295">(Oct 21 2020 at 21:20)</a>:</h4>
<p>The issue is not going to be closed anyway, I think</p>



<a name="214116361"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116361" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116361">(Oct 21 2020 at 21:20)</a>:</h4>
<p>The mir-opt WG will have to fix the pass</p>



<a name="214116403"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116403" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116403">(Oct 21 2020 at 21:20)</a>:</h4>
<p>I think once the PR disabling the pass is backported, we should just tag the issue as <code>requires-nightly</code> and call it a day :D</p>



<a name="214116614"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116614" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116614">(Oct 21 2020 at 21:22)</a>:</h4>
<p>And maybe <code>P-medium</code> as you suggested (once the backport has happened)</p>



<a name="214116749"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116749" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116749">(Oct 21 2020 at 21:23)</a>:</h4>
<p>I think in the past we had assigned <code>P-medium</code> to issues waiting for backports</p>



<a name="214116795"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116795" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116795">(Oct 21 2020 at 21:24)</a>:</h4>
<p>Well it's better to be safe and make sure it doesn't get lost :)</p>



<a name="214116831"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116831" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116831">(Oct 21 2020 at 21:24)</a>:</h4>
<p>So what I'd suggest is to change the priority to <code>P-medium</code> now (so we don't "pollute" the agenda)</p>



<a name="214116848"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116848" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116848">(Oct 21 2020 at 21:24)</a>:</h4>
<p><span class="user-mention silent" data-user-id="307537">Camelid</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214116795">said</a>:</p>
<blockquote>
<p>Well it's better to be safe and make sure it doesn't get lost :)</p>
</blockquote>
<p>We have the backport request</p>



<a name="214116907"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116907" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116907">(Oct 21 2020 at 21:25)</a>:</h4>
<p>I don't know; my thinking is it's still P-critical on beta until the backport has happened, so we should leave the label as such</p>



<a name="214116991"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214116991" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214116991">(Oct 21 2020 at 21:25)</a>:</h4>
<p>On the other hand that's no longer the issue that's important to focus on, but the PR</p>



<a name="214117125"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117125" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> apiraino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117125">(Oct 21 2020 at 21:27)</a>:</h4>
<p>uh right, but ... uhm ... what is this issue about? If I understand there is a MIR optimization <a href="https://github.com/rust-lang/rust/issues/77369">#77369</a> that causes the memory  issue (?)<br>
And what about pr <a href="https://github.com/rust-lang/rust/issues/78147">#78147</a> and  <a href="https://github.com/rust-lang/rust/issues/76683">#76683</a>?</p>



<a name="214117163"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117163" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117163">(Oct 21 2020 at 21:27)</a>:</h4>
<p>There's a MIR opt that had unsoundness and thus needed to be temporarily disabled</p>



<a name="214117236"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117236" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117236">(Oct 21 2020 at 21:28)</a>:</h4>
<p>It was disabled in <a href="https://github.com/rust-lang/rust/issues/78195">#78195</a></p>



<a name="214117256"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117256" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oliver <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117256">(Oct 21 2020 at 21:28)</a>:</h4>
<p><span class="user-mention silent" data-user-id="250987">apiraino</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214117125">said</a>:</p>
<blockquote>
<p>what about pr <a href="https://github.com/rust-lang/rust/issues/78147">#78147</a> and  <a href="https://github.com/rust-lang/rust/issues/76683">#76683</a>?</p>
</blockquote>
<p>I don't understand either of these</p>



<a name="214117293"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117293" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117293">(Oct 21 2020 at 21:29)</a>:</h4>
<p>Same here :)</p>



<a name="214117307"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117307" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117307">(Oct 21 2020 at 21:29)</a>:</h4>
<p>It's MIR-opt stuff :D</p>



<a name="214117332"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117332" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117332">(Oct 21 2020 at 21:29)</a>:</h4>
<p>I think they run a validator for each beta to try to catch bugs like these</p>



<a name="214117380"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117380" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117380">(Oct 21 2020 at 21:30)</a>:</h4>
<p>I know, I'm trying to learn about this stuff for my own compiler :)</p>



<a name="214117395"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117395" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117395">(Oct 21 2020 at 21:30)</a>:</h4>
<p>You mean with crater?</p>



<a name="214117428"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117428" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117428">(Oct 21 2020 at 21:30)</a>:</h4>
<p><span class="user-mention silent" data-user-id="307537">Camelid</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214117395">said</a>:</p>
<blockquote>
<p>You mean with crater?</p>
</blockquote>
<p>Unsure</p>



<a name="214117459"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117459" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117459">(Oct 21 2020 at 21:31)</a>:</h4>
<p>I think I read something or someone talked about it here</p>



<a name="214117517"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117517" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117517">(Oct 21 2020 at 21:31)</a>:</h4>
<p>IIUC <a href="https://github.com/rust-lang/rust/issues/77369">#77369</a> implemented a new check to the MIR validator</p>



<a name="214117604"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117604" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117604">(Oct 21 2020 at 21:32)</a>:</h4>
<p>And <a href="https://github.com/rust-lang/rust/issues/78147">#78147</a> too probably</p>



<a name="214117619"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117619" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117619">(Oct 21 2020 at 21:32)</a>:</h4>
<p>Seems like <a href="https://github.com/rust-lang/rust/issues/78147">#78147</a> was failing because of this bug</p>



<a name="214117670"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117670" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117670">(Oct 21 2020 at 21:33)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/issues/76683">#76683</a> is the PR that introduced the bug</p>



<a name="214117725"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117725" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117725">(Oct 21 2020 at 21:34)</a>:</h4>
<p>The pass was disabled in <a href="https://github.com/rust-lang/rust/issues/78195">#78195</a></p>



<a name="214117738"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117738" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117738">(Oct 21 2020 at 21:34)</a>:</h4>
<p><span class="user-mention silent" data-user-id="307537">Camelid</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214117236">said</a>:</p>
<blockquote>
<p>It was disabled in <a href="https://github.com/rust-lang/rust/issues/78195">#78195</a></p>
</blockquote>
<p>^</p>



<a name="214117952"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214117952" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214117952">(Oct 21 2020 at 21:36)</a>:</h4>
<p><span class="user-mention silent" data-user-id="255061">LeSeulArtichaut</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214117428">said</a>:</p>
<blockquote>
<p><span class="user-mention silent" data-user-id="307537">Camelid</span> <a href="#narrow/stream/245100-t-compiler.2Fwg-prioritization.2Falerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6/near/214117395">said</a>:</p>
<blockquote>
<p>You mean with crater?</p>
</blockquote>
<p>Unsure</p>
</blockquote>
<p>Asked <a href="#narrow/stream/189540-t-compiler.2Fwg-mir-opt/topic/beta.20validations">here</a>.</p>



<a name="214118124"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214118124" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> apiraino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214118124">(Oct 21 2020 at 21:38)</a>:</h4>
<p>thank you <span class="user-mention" data-user-id="255061">@LeSeulArtichaut</span> <span aria-label="cake" class="emoji emoji-1f370" role="img" title="cake">:cake:</span></p>



<a name="214130524"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214130524" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214130524">(Oct 22 2020 at 00:13)</a>:</h4>
<p>I think what we have done in the past is leave this <code>P-critical</code> until the backport lands on beta and then we need a test and once that test lands the issue can be just closed</p>



<a name="214130550"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214130550" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214130550">(Oct 22 2020 at 00:13)</a>:</h4>
<p>or well, maybe we want to have an issue to track the mir opt issue, like to do a real fix instead of disabling it</p>



<a name="214131456"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214131456" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214131456">(Oct 22 2020 at 00:29)</a>:</h4>
<p>Sounds good</p>



<a name="214636449"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214636449" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214636449">(Oct 26 2020 at 21:36)</a>:</h4>
<p><span class="user-group-mention" data-user-group-id="3111">@WG-prioritization/alerts</span> issue <a href="https://github.com/rust-lang/rust/issues/78192">#78192</a> has been requested for prioritization.</p>
<h1><a href="https://forge.rust-lang.org/compiler/prioritization/procedure.html#assign-priority-to-unprioritized-issues-with-i-prioritize-label">Procedure</a></h1>
<ul>
<li>Priority?</li>
<li>Regression?</li>
<li>Notify people/groups?</li>
<li>Needs <code>I-nominated</code>?</li>
</ul>



<a name="214636696"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214636696" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jonas Schievink  [he/him] <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214636696">(Oct 26 2020 at 21:39)</a>:</h4>
<p><code>P-critical</code> again</p>



<a name="214636702"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214636702" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jonas Schievink  [he/him] <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214636702">(Oct 26 2020 at 21:39)</a>:</h4>
<p><em>sigh</em></p>



<a name="214640492"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214640492" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214640492">(Oct 26 2020 at 22:19)</a>:</h4>
<p>I guess this case was not caught when the pass was re-enabled?</p>



<a name="214640598"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214640598" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214640598">(Oct 26 2020 at 22:21)</a>:</h4>
<p>Issue <a href="https://github.com/rust-lang/rust/issues/78192">#78192</a>'s prioritization request has been removed.</p>



<a name="214648976"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214648976" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214648976">(Oct 27 2020 at 00:22)</a>:</h4>
<p>Do we want to ping MIR-opt folks for this?</p>



<a name="214679473"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214679473" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jonas Schievink  [he/him] <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214679473">(Oct 27 2020 at 10:00)</a>:</h4>
<p>Opened <a href="https://github.com/rust-lang/rust/pull/78434">https://github.com/rust-lang/rust/pull/78434</a> to disable the opt</p>



<a name="214814404"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378192%20InstCombine%20introduces%20an%20incorrect%20use%E2%80%A6/near/214814404" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> apiraino <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378192.20InstCombine.20introduces.20an.20incorrect.20use.E2.80.A6.html#214814404">(Oct 28 2020 at 09:57)</a>:</h4>
<p>Thanks for the patch <span class="user-mention" data-user-id="211727">@Jonas Schievink</span> :)</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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